Method and system for controlling a power production entity

Abstract

A method for controlling a power production entity is provided. The method includes generating a plurality of electric power signals by a plurality of power production entities, measuring a plurality of power levels of the plurality of power signals, modifying the plurality of power signals, supplying the plurality of modified power signals at a common node, and adjusting an operation voltage of at least one power production entity of the plurality of power production entities based on the plurality of measured power levels such that a power loss of the power signals caused by the modifying and/or supplying is minimized. Also a system for controlling a power production entity is described.

1 .- 13 . (canceled) 
     
     
         14 . A method for controlling a power production entity, the method comprising:
 generating a plurality of electric power signals by a plurality of power production entities;   measuring a plurality of power levels of the plurality of power signals;   modifying the plurality of power signals;   supplying the plurality of modified power signals at a common node; and   adjusting an operation voltage of at least one power production entity of the plurality of power production entities based on the plurality of measured power levels such that a power loss of the power signals caused by the modifying and/or supplying is minimized.   
     
     
         15 . The method according to  claim 14 , wherein the adjusting the operation voltage is performed such that a voltage at the common node is within a predetermined minimum and predetermined maximum of a target node voltage. 
     
     
         16 . The method according to  claim 15 , wherein a first range describing the predetermined minimum and the predetermined maximum is 0.9 to 1.1 times a predetermined target node voltage. 
     
     
         17 . The method according to  claim 14 , wherein the adjusting the operation voltage is performed such that the adjusted operation voltage is within a predetermined minimum and predetermined maximum of a target operation voltage. 
     
     
         18 . The method according to  claim 17 , wherein a second range describing the predetermined minimum and the predetermined maximum is 0.9 to 1.1 times a predetermined target operation voltage. 
     
     
         19 . The method according to  claim 14 , wherein the adjusting the operation voltage is performed such that at least two adjusted operation voltages are different. 
     
     
         20 . The method according to  claim 14 , wherein the adjusting the operation voltage is further based on establishing a relationship between the power loss and the operation voltage. 
     
     
         21 . The method according to  claim 14 , wherein the modifying the plurality of power signals comprises:
 converting the plurality of power signals to a predetermined frequency,   transforming the plurality of converted power signals to a higher voltage, and   transmitting the plurality of transformed power signals to the common node.   
     
     
         22 . The method according to  claim 14 , wherein adjusting the operation voltages is further based on modelling the modifying the plurality of power signals using a simulation. 
     
     
         23 . The method according to  claim 22 , wherein the simulation uses a gradient of the power loss of the power signals with respect to at least one of the operation voltages. 
     
     
         24 . The method according to  claim 14 , further comprising measuring a voltage at the common node, wherein the adjusting the operation voltage is further based on the measured common node voltage. 
     
     
         25 . The method according to  claim 14 , wherein the adjusting the operation voltage is further based on a solution of minimizing the power loss under a constraint that the voltage at the common node remains within a predetermined minimum and predetermined maximum of a target node voltage and the operation voltages remain within a predetermined minimum and predetermined maximum of a target operation voltage. 
     
     
         26 . The method according to  claim 25 , wherein the predetermined minimum and predetermined maximum of the target node voltage is within 0.9 to 1.1 times a target node voltage and the predetermined minimum and predetermined maximum of a target operation voltage is within 0.9 to 1.1 times a target operation voltage. 
     
     
         27 . A system for controlling a power production entity, the system comprising:
 a common node at which a plurality of modified power output signals are supplied, the plurality of modified power output signals being obtained by modifying a plurality of electric power signals generated by a plurality of power production entities;   a measuring system for determining power levels of the plurality of power output signals; and   a control unit adapted to adjust an operation voltage of at least one of the plurality of power production entities such that a power loss caused by the modifying the electric power signals and/or supplying the modified electric power signals to the common node is minimized.   
     
     
         28 . The system according to  claim 27 , wherein the measuring system comprises a voltage sensor for measuring a voltage at the common node and a power sensor for measuring a power of a sum of the plurality of power output signals. 
     
     
         29 . The system according to  claim 27 , wherein the measuring system comprises a voltage sensor for measuring a voltage at the common node. 
     
     
         30 . The system according to  claim 27 , wherein the measuring system comprises a power sensor for measuring a power of a sum of the plurality of power output signals. 
     
     
         31 . An electric power facility, comprising:
 a system, comprising:
 a common node at which a plurality of modified power output signals are supplied, the plurality of modified power output signals being obtained by modifying a plurality of electric power signals generated by a plurality of power production entities, 
 a measuring system for determining power levels of the plurality of power output signals, and 
 a control unit adapted to adjust an operation voltage of at least one of the plurality of power production entities such that a power loss caused by the modifying the electric power signals and/or supplying the modified electric power signals to the common node is minimized; and 
   a plurality of power production entities adapted to generate the plurality of power output signals.   
     
     
         32 . The electric power facility according to  claim 31 , wherein the control unit is adapted to adjust the operation voltage based on a model of the electric power facility. 
     
     
         33 . The electric power facility according to  claim 31 , wherein the measuring system comprises a voltage sensor for measuring a voltage at the common node and a power sensor for measuring a power of a sum of the plurality of power output signals.